source3/lib/smbldap.c

   1 /*
   2    Unix SMB/CIFS implementation.
   3    LDAP protocol helper functions for SAMBA
   4    Copyright (C) Jean François Micouleau       1998
   5    Copyright (C) Gerald Carter                  2001-2003
   6    Copyright (C) Shahms King                    2001
   7    Copyright (C) Andrew Bartlett                2002-2003
   8    Copyright (C) Stefan (metze) Metzmacher      2002-2003
   9
  10    This program is free software; you can redistribute it and/or modify
  11    it under the terms of the GNU General Public License as published by
  12    the Free Software Foundation; either version 3 of the License, or
  13    (at your option) any later version.
  14
  15    This program is distributed in the hope that it will be useful,
  16    but WITHOUT ANY WARRANTY; without even the implied warranty of
  17    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18    GNU General Public License for more details.
  19
  20    You should have received a copy of the GNU General Public License
  21    along with this program.  If not, see <http://www.gnu.org/licenses/>.
  22
  23 */
  24
  25 #include "includes.h"
  26 #include "smbldap.h"
  27
  28 #ifndef LDAP_OPT_SUCCESS
  29 #define LDAP_OPT_SUCCESS 0
  30 #endif
  31
  32 /* Try not to hit the up or down server forever */
  33
  34 #define SMBLDAP_DONT_PING_TIME 10       /* ping only all 10 seconds */
  35 #define SMBLDAP_NUM_RETRIES 8           /* retry only 8 times */
  36
  37 #define SMBLDAP_IDLE_TIME 150           /* After 2.5 minutes disconnect */
  38
  39
  40 /* attributes used by Samba 2.2 */
  41
  42 ATTRIB_MAP_ENTRY attrib_map_v22[] = {
  43         { LDAP_ATTR_UID,                "uid"           },
  44         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
  45         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
  46         { LDAP_ATTR_UNIX_HOME,          "homeDirectory" },
  47         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  48         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  49         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  50         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  51         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  52         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  53         { LDAP_ATTR_CN,                 "cn"            },
  54         { LDAP_ATTR_SN,                 "sn"            },
  55         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  56         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  57         { LDAP_ATTR_HOME_DRIVE,         "homeDrive"     },
  58         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  59         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  60         { LDAP_ATTR_DESC,               "description"   },
  61         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  62         { LDAP_ATTR_USER_RID,           "rid"           },
  63         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  64         { LDAP_ATTR_LMPW,               "lmPassword"    },
  65         { LDAP_ATTR_NTPW,               "ntPassword"    },
  66         { LDAP_ATTR_DOMAIN,             "domain"        },
  67         { LDAP_ATTR_OBJCLASS,           "objectClass"   },
  68         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  69         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
  70         { LDAP_ATTR_LIST_END,           NULL            }
  71 };
  72
  73 ATTRIB_MAP_ENTRY attrib_map_to_delete_v22[] = {
  74         { LDAP_ATTR_PWD_LAST_SET,       "pwdLastSet"    },
  75         { LDAP_ATTR_PWD_CAN_CHANGE,     "pwdCanChange"  },
  76         { LDAP_ATTR_PWD_MUST_CHANGE,    "pwdMustChange" },
  77         { LDAP_ATTR_LOGON_TIME,         "logonTime"     },
  78         { LDAP_ATTR_LOGOFF_TIME,        "logoffTime"    },
  79         { LDAP_ATTR_KICKOFF_TIME,       "kickoffTime"   },
  80         { LDAP_ATTR_DISPLAY_NAME,       "displayName"   },
  81         { LDAP_ATTR_HOME_PATH,          "smbHome"       },
  82         { LDAP_ATTR_HOME_DRIVE,         "homeDrives"    },
  83         { LDAP_ATTR_LOGON_SCRIPT,       "scriptPath"    },
  84         { LDAP_ATTR_PROFILE_PATH,       "profilePath"   },
  85         { LDAP_ATTR_USER_WKS,           "userWorkstations"},
  86         { LDAP_ATTR_USER_RID,           "rid"           },
  87         { LDAP_ATTR_PRIMARY_GROUP_RID,  "primaryGroupID"},
  88         { LDAP_ATTR_LMPW,               "lmPassword"    },
  89         { LDAP_ATTR_NTPW,               "ntPassword"    },
  90         { LDAP_ATTR_DOMAIN,             "domain"        },
  91         { LDAP_ATTR_ACB_INFO,           "acctFlags"     },
  92         { LDAP_ATTR_LIST_END,           NULL            }
  93 };
  94
  95 /* attributes used by Samba 3.0's sambaSamAccount */
  96
  97 ATTRIB_MAP_ENTRY attrib_map_v30[] = {
  98         { LDAP_ATTR_UID,                "uid"                   },
  99         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 100         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 101         { LDAP_ATTR_UNIX_HOME,          "homeDirectory"         },
 102         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 103         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 104         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 105         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 106         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 107         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 108         { LDAP_ATTR_CN,                 "cn"                    },
 109         { LDAP_ATTR_SN,                 "sn"                    },
 110         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 111         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 112         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 113         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 114         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 115         { LDAP_ATTR_DESC,               "description"           },
 116         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 117         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 118         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 119         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 120         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 121         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 122         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 123         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 124         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 125         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 126         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 127         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 128         { LDAP_ATTR_MOD_TIMESTAMP,      "modifyTimestamp"       },
 129         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 130         { LDAP_ATTR_LIST_END,           NULL                    }
 131 };
 132
 133 ATTRIB_MAP_ENTRY attrib_map_to_delete_v30[] = {
 134         { LDAP_ATTR_PWD_LAST_SET,       "sambaPwdLastSet"       },
 135         { LDAP_ATTR_PWD_CAN_CHANGE,     "sambaPwdCanChange"     },
 136         { LDAP_ATTR_PWD_MUST_CHANGE,    "sambaPwdMustChange"    },
 137         { LDAP_ATTR_LOGON_TIME,         "sambaLogonTime"        },
 138         { LDAP_ATTR_LOGOFF_TIME,        "sambaLogoffTime"       },
 139         { LDAP_ATTR_KICKOFF_TIME,       "sambaKickoffTime"      },
 140         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 141         { LDAP_ATTR_HOME_DRIVE,         "sambaHomeDrive"        },
 142         { LDAP_ATTR_HOME_PATH,          "sambaHomePath"         },
 143         { LDAP_ATTR_LOGON_SCRIPT,       "sambaLogonScript"      },
 144         { LDAP_ATTR_PROFILE_PATH,       "sambaProfilePath"      },
 145         { LDAP_ATTR_USER_WKS,           "sambaUserWorkstations" },
 146         { LDAP_ATTR_USER_SID,           LDAP_ATTRIBUTE_SID      },
 147         { LDAP_ATTR_PRIMARY_GROUP_SID,  "sambaPrimaryGroupSID"  },
 148         { LDAP_ATTR_LMPW,               "sambaLMPassword"       },
 149         { LDAP_ATTR_NTPW,               "sambaNTPassword"       },
 150         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 151         { LDAP_ATTR_ACB_INFO,           "sambaAcctFlags"        },
 152         { LDAP_ATTR_MUNGED_DIAL,        "sambaMungedDial"       },
 153         { LDAP_ATTR_BAD_PASSWORD_COUNT, "sambaBadPasswordCount" },
 154         { LDAP_ATTR_BAD_PASSWORD_TIME,  "sambaBadPasswordTime"  },
 155         { LDAP_ATTR_PWD_HISTORY,        "sambaPasswordHistory"  },
 156         { LDAP_ATTR_LOGON_HOURS,        "sambaLogonHours"       },
 157         { LDAP_ATTR_LIST_END,           NULL                    }
 158 };
 159
 160 /* attributes used for allocating RIDs */
 161
 162 ATTRIB_MAP_ENTRY dominfo_attr_list[] = {
 163         { LDAP_ATTR_DOMAIN,             "sambaDomainName"       },
 164         { LDAP_ATTR_NEXT_RID,           "sambaNextRid"          },
 165         { LDAP_ATTR_NEXT_USERRID,       "sambaNextUserRid"      },
 166         { LDAP_ATTR_NEXT_GROUPRID,      "sambaNextGroupRid"     },
 167         { LDAP_ATTR_DOM_SID,            LDAP_ATTRIBUTE_SID      },
 168         { LDAP_ATTR_ALGORITHMIC_RID_BASE,"sambaAlgorithmicRidBase"},
 169         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 170         { LDAP_ATTR_LIST_END,           NULL                    },
 171 };
 172
 173 /* Samba 3.0 group mapping attributes */
 174
 175 ATTRIB_MAP_ENTRY groupmap_attr_list[] = {
 176         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 177         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 178         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 179         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 180         { LDAP_ATTR_DESC,               "description"           },
 181         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 182         { LDAP_ATTR_CN,                 "cn"                    },
 183         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 184         { LDAP_ATTR_LIST_END,           NULL                    }
 185 };
 186
 187 ATTRIB_MAP_ENTRY groupmap_attr_list_to_delete[] = {
 188         { LDAP_ATTR_GROUP_SID,          LDAP_ATTRIBUTE_SID      },
 189         { LDAP_ATTR_GROUP_TYPE,         "sambaGroupType"        },
 190         { LDAP_ATTR_DESC,               "description"           },
 191         { LDAP_ATTR_DISPLAY_NAME,       "displayName"           },
 192         { LDAP_ATTR_SID_LIST,           "sambaSIDList"          },
 193         { LDAP_ATTR_LIST_END,           NULL                    }
 194 };
 195
 196 /* idmap_ldap sambaUnixIdPool */
 197
 198 ATTRIB_MAP_ENTRY idpool_attr_list[] = {
 199         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 200         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 201         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 202         { LDAP_ATTR_LIST_END,           NULL                    }
 203 };
 204
 205 ATTRIB_MAP_ENTRY sidmap_attr_list[] = {
 206         { LDAP_ATTR_SID,                LDAP_ATTRIBUTE_SID      },
 207         { LDAP_ATTR_UIDNUMBER,          LDAP_ATTRIBUTE_UIDNUMBER},
 208         { LDAP_ATTR_GIDNUMBER,          LDAP_ATTRIBUTE_GIDNUMBER},
 209         { LDAP_ATTR_OBJCLASS,           "objectClass"           },
 210         { LDAP_ATTR_LIST_END,           NULL                    }
 211 };
 212
 213 /**********************************************************************
 214  perform a simple table lookup and return the attribute name
 215  **********************************************************************/
 216
 217  const char* get_attr_key2string( ATTRIB_MAP_ENTRY table[], int key )
 218 {
 219         int i = 0;
 220
 221         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 222                 if ( table[i].attrib == key )
 223                         return table[i].name;
 224                 i++;
 225         }
 226
 227         return NULL;
 228 }
 229
 230
 231 /**********************************************************************
 232  Return the list of attribute names from a mapping table
 233  **********************************************************************/
 234
 235  const char** get_attr_list( TALLOC_CTX *mem_ctx, ATTRIB_MAP_ENTRY table[] )
 236 {
 237         const char **names;
 238         int i = 0;
 239
 240         while ( table[i].attrib != LDAP_ATTR_LIST_END )
 241                 i++;
 242         i++;
 243
 244         names = TALLOC_ARRAY( mem_ctx, const char*, i );
 245         if ( !names ) {
 246                 DEBUG(0,("get_attr_list: out of memory\n"));
 247                 return NULL;
 248         }
 249
 250         i = 0;
 251         while ( table[i].attrib != LDAP_ATTR_LIST_END ) {
 252                 names[i] = talloc_strdup( names, table[i].name );
 253                 i++;
 254         }
 255         names[i] = NULL;
 256
 257         return names;
 258 }
 259
 260 /*******************************************************************
 261  Search an attribute and return the first value found.
 262 ******************************************************************/
 263
 264  bool smbldap_get_single_attribute (LDAP * ldap_struct, LDAPMessage * entry,
 265                                     const char *attribute, char *value,
 266                                     int max_len)
 267 {
 268         char **values;
 269
 270         if ( !attribute )
 271                 return False;
 272
 273         value[0] = '\0';
 274
 275         if ((values = ldap_get_values (ldap_struct, entry, attribute)) == NULL) {
 276                 DEBUG (10, ("smbldap_get_single_attribute: [%s] = [<does not exist>]\n", attribute));
 277
 278                 return False;
 279         }
 280
 281         if (convert_string(CH_UTF8, CH_UNIX,values[0], -1, value, max_len, False) == (size_t)-1) {
 282                 DEBUG(1, ("smbldap_get_single_attribute: string conversion of [%s] = [%s] failed!\n",
 283                           attribute, values[0]));
 284                 ldap_value_free(values);
 285                 return False;
 286         }
 287
 288         ldap_value_free(values);
 289 #ifdef DEBUG_PASSWORDS
 290         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n", attribute, value));
 291 #endif
 292         return True;
 293 }
 294
 295  char * smbldap_talloc_single_attribute(LDAP *ldap_struct, LDAPMessage *entry,
 296                                         const char *attribute,
 297                                         TALLOC_CTX *mem_ctx)
 298 {
 299         char **values;
 300         char *result;
 301         size_t converted_size;
 302
 303         if (attribute == NULL) {
 304                 return NULL;
 305         }
 306
 307         values = ldap_get_values(ldap_struct, entry, attribute);
 308
 309         if (values == NULL) {
 310                 DEBUG(10, ("attribute %s does not exist\n", attribute));
 311                 return NULL;
 312         }
 313
 314         if (ldap_count_values(values) != 1) {
 315                 DEBUG(10, ("attribute %s has %d values, expected only one\n",
 316                            attribute, ldap_count_values(values)));
 317                 ldap_value_free(values);
 318                 return NULL;
 319         }
 320
 321         if (!pull_utf8_talloc(mem_ctx, &result, values[0], &converted_size)) {
 322                 DEBUG(10, ("pull_utf8_talloc failed\n"));
 323                 ldap_value_free(values);
 324                 return NULL;
 325         }
 326
 327         ldap_value_free(values);
 328
 329 #ifdef DEBUG_PASSWORDS
 330         DEBUG (100, ("smbldap_get_single_attribute: [%s] = [%s]\n",
 331                      attribute, result));
 332 #endif
 333         return result;
 334 }
 335
 336  static int ldapmsg_destructor(LDAPMessage **result) {
 337         ldap_msgfree(*result);
 338         return 0;
 339 }
 340
 341  void talloc_autofree_ldapmsg(TALLOC_CTX *mem_ctx, LDAPMessage *result)
 342 {
 343         LDAPMessage **handle;
 344
 345         if (result == NULL) {
 346                 return;
 347         }
 348
 349         handle = TALLOC_P(mem_ctx, LDAPMessage *);
 350         SMB_ASSERT(handle != NULL);
 351
 352         *handle = result;
 353         talloc_set_destructor(handle, ldapmsg_destructor);
 354 }
 355
 356  static int ldapmod_destructor(LDAPMod ***mod) {
 357         ldap_mods_free(*mod, True);
 358         return 0;
 359 }
 360
 361  void talloc_autofree_ldapmod(TALLOC_CTX *mem_ctx, LDAPMod **mod)
 362 {
 363         LDAPMod ***handle;
 364
 365         if (mod == NULL) {
 366                 return;
 367         }
 368
 369         handle = TALLOC_P(mem_ctx, LDAPMod **);
 370         SMB_ASSERT(handle != NULL);
 371
 372         *handle = mod;
 373         talloc_set_destructor(handle, ldapmod_destructor);
 374 }
 375
 376 /************************************************************************
 377  Routine to manage the LDAPMod structure array
 378  manage memory used by the array, by each struct, and values
 379  ***********************************************************************/
 380
 381  void smbldap_set_mod (LDAPMod *** modlist, int modop, const char *attribute, const char *value)
 382 {
 383         LDAPMod **mods;
 384         int i;
 385         int j;
 386
 387         mods = *modlist;
 388
 389         /* sanity checks on the mod values */
 390
 391         if (attribute == NULL || *attribute == '\0') {
 392                 return;
 393         }
 394
 395 #if 0   /* commented out after discussion with abartlet.  Do not reenable.
 396            left here so other do not re-add similar code   --jerry */
 397         if (value == NULL || *value == '\0')
 398                 return;
 399 #endif
 400
 401         if (mods == NULL) {
 402                 mods = SMB_MALLOC_P(LDAPMod *);
 403                 if (mods == NULL) {
 404                         smb_panic("smbldap_set_mod: out of memory!");
 405                         /* notreached. */
 406                 }
 407                 mods[0] = NULL;
 408         }
 409
 410         for (i = 0; mods[i] != NULL; ++i) {
 411                 if (mods[i]->mod_op == modop && strequal(mods[i]->mod_type, attribute))
 412                         break;
 413         }
 414
 415         if (mods[i] == NULL) {
 416                 mods = SMB_REALLOC_ARRAY (mods, LDAPMod *, i + 2);
 417                 if (mods == NULL) {
 418                         smb_panic("smbldap_set_mod: out of memory!");
 419                         /* notreached. */
 420                 }
 421                 mods[i] = SMB_MALLOC_P(LDAPMod);
 422                 if (mods[i] == NULL) {
 423                         smb_panic("smbldap_set_mod: out of memory!");
 424                         /* notreached. */
 425                 }
 426                 mods[i]->mod_op = modop;
 427                 mods[i]->mod_values = NULL;
 428                 mods[i]->mod_type = SMB_STRDUP(attribute);
 429                 mods[i + 1] = NULL;
 430         }
 431
 432         if (value != NULL) {
 433                 char *utf8_value = NULL;
 434                 size_t converted_size;
 435
 436                 j = 0;
 437                 if (mods[i]->mod_values != NULL) {
 438                         for (; mods[i]->mod_values[j] != NULL; j++);
 439                 }
 440                 mods[i]->mod_values = SMB_REALLOC_ARRAY(mods[i]->mod_values, char *, j + 2);
 441
 442                 if (mods[i]->mod_values == NULL) {
 443                         smb_panic("smbldap_set_mod: out of memory!");
 444                         /* notreached. */
 445                 }
 446
 447                 if (!push_utf8_allocate(&utf8_value, value, &converted_size)) {
 448                         smb_panic("smbldap_set_mod: String conversion failure!");
 449                         /* notreached. */
 450                 }
 451
 452                 mods[i]->mod_values[j] = utf8_value;
 453
 454                 mods[i]->mod_values[j + 1] = NULL;
 455         }
 456         *modlist = mods;
 457 }
 458
 459 /**********************************************************************
 460   Set attribute to newval in LDAP, regardless of what value the
 461   attribute had in LDAP before.
 462 *********************************************************************/
 463
 464  void smbldap_make_mod(LDAP *ldap_struct, LDAPMessage *existing,
 465                       LDAPMod ***mods,
 466                       const char *attribute, const char *newval)
 467 {
 468         char oldval[2048]; /* current largest allowed value is mungeddial */
 469         bool existed;
 470
 471         if (attribute == NULL) {
 472                 /* This can actually happen for ldapsam_compat where we for
 473                  * example don't have a password history */
 474                 return;
 475         }
 476
 477         if (existing != NULL) {
 478                 existed = smbldap_get_single_attribute(ldap_struct, existing, attribute, oldval, sizeof(oldval));
 479         } else {
 480                 existed = False;
 481                 *oldval = '\0';
 482         }
 483
 484         /* all of our string attributes are case insensitive */
 485
 486         if (existed && newval && (StrCaseCmp(oldval, newval) == 0)) {
 487
 488                 /* Believe it or not, but LDAP will deny a delete and
 489                    an add at the same time if the values are the
 490                    same... */
 491                 DEBUG(10,("smbldap_make_mod: attribute |%s| not changed.\n", attribute));
 492                 return;
 493         }
 494
 495         if (existed) {
 496                 /* There has been no value before, so don't delete it.
 497                  * Here's a possible race: We might end up with
 498                  * duplicate attributes */
 499                 /* By deleting exactly the value we found in the entry this
 500                  * should be race-free in the sense that the LDAP-Server will
 501                  * deny the complete operation if somebody changed the
 502                  * attribute behind our back. */
 503                 /* This will also allow modifying single valued attributes
 504                  * in Novell NDS. In NDS you have to first remove attribute and then
 505                  * you could add new value */
 506
 507                 DEBUG(10,("smbldap_make_mod: deleting attribute |%s| values |%s|\n", attribute, oldval));
 508                 smbldap_set_mod(mods, LDAP_MOD_DELETE, attribute, oldval);
 509         }
 510
 511         /* Regardless of the real operation (add or modify)
 512            we add the new value here. We rely on deleting
 513            the old value, should it exist. */
 514
 515         if ((newval != NULL) && (strlen(newval) > 0)) {
 516                 DEBUG(10,("smbldap_make_mod: adding attribute |%s| value |%s|\n", attribute, newval));
 517                 smbldap_set_mod(mods, LDAP_MOD_ADD, attribute, newval);
 518         }
 519 }
 520
 521 /**********************************************************************
 522  Some varients of the LDAP rebind code do not pass in the third 'arg'
 523  pointer to a void*, so we try and work around it by assuming that the
 524  value of the 'LDAP *' pointer is the same as the one we had passed in
 525  **********************************************************************/
 526
 527 struct smbldap_state_lookup {
 528         LDAP *ld;
 529         struct smbldap_state *smbldap_state;
 530         struct smbldap_state_lookup *prev, *next;
 531 };
 532
 533 static struct smbldap_state_lookup *smbldap_state_lookup_list;
 534
 535 static struct smbldap_state *smbldap_find_state(LDAP *ld)
 536 {
 537         struct smbldap_state_lookup *t;
 538
 539         for (t = smbldap_state_lookup_list; t; t = t->next) {
 540                 if (t->ld == ld) {
 541                         return t->smbldap_state;
 542                 }
 543         }
 544         return NULL;
 545 }
 546
 547 static void smbldap_delete_state(struct smbldap_state *smbldap_state)
 548 {
 549         struct smbldap_state_lookup *t;
 550
 551         for (t = smbldap_state_lookup_list; t; t = t->next) {
 552                 if (t->smbldap_state == smbldap_state) {
 553                         DLIST_REMOVE(smbldap_state_lookup_list, t);
 554                         SAFE_FREE(t);
 555                         return;
 556                 }
 557         }
 558 }
 559
 560 static void smbldap_store_state(LDAP *ld, struct smbldap_state *smbldap_state)
 561 {
 562         struct smbldap_state *tmp_ldap_state;
 563         struct smbldap_state_lookup *t;
 564
 565         if ((tmp_ldap_state = smbldap_find_state(ld))) {
 566                 SMB_ASSERT(tmp_ldap_state == smbldap_state);
 567                 return;
 568         }
 569
 570         t = SMB_XMALLOC_P(struct smbldap_state_lookup);
 571         ZERO_STRUCTP(t);
 572
 573         DLIST_ADD_END(smbldap_state_lookup_list, t, struct smbldap_state_lookup *);
 574         t->ld = ld;
 575         t->smbldap_state = smbldap_state;
 576 }
 577
 578 /********************************************************************
 579  start TLS on an existing LDAP connection
 580 *******************************************************************/
 581
 582 int smb_ldap_start_tls(LDAP *ldap_struct, int version)
 583 {
 584         int rc;
 585
 586         if (lp_ldap_ssl() != LDAP_SSL_START_TLS) {
 587                 return LDAP_SUCCESS;
 588         }
 589
 590 #ifdef LDAP_OPT_X_TLS
 591         if (version != LDAP_VERSION3) {
 592                 DEBUG(0, ("Need LDAPv3 for Start TLS\n"));
 593                 return LDAP_OPERATIONS_ERROR;
 594         }
 595
 596         if ((rc = ldap_start_tls_s (ldap_struct, NULL, NULL)) != LDAP_SUCCESS)  {
 597                 DEBUG(0,("Failed to issue the StartTLS instruction: %s\n",
 598                          ldap_err2string(rc)));
 599                 return rc;
 600         }
 601
 602         DEBUG (3, ("StartTLS issued: using a TLS connection\n"));
 603         return LDAP_SUCCESS;
 604 #else
 605         DEBUG(0,("StartTLS not supported by LDAP client libraries!\n"));
 606         return LDAP_OPERATIONS_ERROR;
 607 #endif
 608 }
 609
 610 /********************************************************************
 611  setup a connection to the LDAP server based on a uri
 612 *******************************************************************/
 613
 614 int smb_ldap_setup_conn(LDAP **ldap_struct, const char *uri)
 615 {
 616         int rc;
 617
 618         DEBUG(10, ("smb_ldap_setup_connection: %s\n", uri));
 619
 620 #ifdef HAVE_LDAP_INITIALIZE
 621
 622         rc = ldap_initialize(ldap_struct, uri);
 623         if (rc) {
 624                 DEBUG(0, ("ldap_initialize: %s\n", ldap_err2string(rc)));
 625         }
 626
 627         return rc;
 628 #else
 629
 630         /* Parse the string manually */
 631
 632         {
 633                 int port = 0;
 634                 fstring protocol;
 635                 fstring host;
 636                 SMB_ASSERT(sizeof(protocol)>10 && sizeof(host)>254);
 637
 638
 639                 /* skip leading "URL:" (if any) */
 640                 if ( strnequal( uri, "URL:", 4 ) ) {
 641                         uri += 4;
 642                 }
 643
 644                 sscanf(uri, "%10[^:]://%254[^:/]:%d", protocol, host, &port);
 645
 646                 if (port == 0) {
 647                         if (strequal(protocol, "ldap")) {
 648                                 port = LDAP_PORT;
 649                         } else if (strequal(protocol, "ldaps")) {
 650                                 port = LDAPS_PORT;
 651                         } else {
 652                                 DEBUG(0, ("unrecognised protocol (%s)!\n", protocol));
 653                         }
 654                 }
 655
 656                 if ((*ldap_struct = ldap_init(host, port)) == NULL)     {
 657                         DEBUG(0, ("ldap_init failed !\n"));
 658                         return LDAP_OPERATIONS_ERROR;
 659                 }
 660
 661                 if (strequal(protocol, "ldaps")) {
 662 #ifdef LDAP_OPT_X_TLS
 663                         int tls = LDAP_OPT_X_TLS_HARD;
 664                         if (ldap_set_option (*ldap_struct, LDAP_OPT_X_TLS, &tls) != LDAP_SUCCESS)
 665                         {
 666                                 DEBUG(0, ("Failed to setup a TLS session\n"));
 667                         }
 668
 669                         DEBUG(3,("LDAPS option set...!\n"));
 670 #else
 671                         DEBUG(0,("smbldap_open_connection: Secure connection not supported by LDAP client libraries!\n"));
 672                         return LDAP_OPERATIONS_ERROR;
 673 #endif /* LDAP_OPT_X_TLS */
 674                 }
 675         }
 676 #endif /* HAVE_LDAP_INITIALIZE */
 677
 678
 679         /* now set connection timeout */
 680 #ifdef LDAP_X_OPT_CONNECT_TIMEOUT /* Netscape */
 681         {
 682                 int ct = lp_ldap_connection_timeout()*1000;
 683                 rc = ldap_set_option(*ldap_struct, LDAP_X_OPT_CONNECT_TIMEOUT, &ct);
 684                 if (rc != LDAP_SUCCESS) {
 685                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 686                                 ct, ldap_err2string(rc)));
 687                 }
 688         }
 689 #elif defined (LDAP_OPT_NETWORK_TIMEOUT) /* OpenLDAP */
 690         {
 691                 struct timeval ct;
 692                 ct.tv_usec = 0;
 693                 ct.tv_sec = lp_ldap_connection_timeout();
 694                 rc = ldap_set_option(*ldap_struct, LDAP_OPT_NETWORK_TIMEOUT, &ct);
 695                 if (rc != LDAP_SUCCESS) {
 696                         DEBUG(0,("Failed to setup an ldap connection timeout %d: %s\n",
 697                                 (int)ct.tv_sec, ldap_err2string(rc)));
 698                 }
 699         }
 700 #endif
 701
 702         return LDAP_SUCCESS;
 703 }
 704
 705 /********************************************************************
 706  try to upgrade to Version 3 LDAP if not already, in either case return current
 707  version
 708  *******************************************************************/
 709
 710 int smb_ldap_upgrade_conn(LDAP *ldap_struct, int *new_version)
 711 {
 712         int version;
 713         int rc;
 714
 715         /* assume the worst */
 716         *new_version = LDAP_VERSION2;
 717
 718         rc = ldap_get_option(ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 719         if (rc) {
 720                 return rc;
 721         }
 722
 723         if (version == LDAP_VERSION3) {
 724                 *new_version = LDAP_VERSION3;
 725                 return LDAP_SUCCESS;
 726         }
 727
 728         /* try upgrade */
 729         version = LDAP_VERSION3;
 730         rc = ldap_set_option (ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
 731         if (rc) {
 732                 return rc;
 733         }
 734
 735         *new_version = LDAP_VERSION3;
 736         return LDAP_SUCCESS;
 737 }
 738
 739 /*******************************************************************
 740  open a connection to the ldap server (just until the bind)
 741  ******************************************************************/
 742
 743 int smb_ldap_setup_full_conn(LDAP **ldap_struct, const char *uri)
 744 {
 745         int rc, version;
 746
 747         rc = smb_ldap_setup_conn(ldap_struct, uri);
 748         if (rc) {
 749                 return rc;
 750         }
 751
 752         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 753         if (rc) {
 754                 return rc;
 755         }
 756
 757         rc = smb_ldap_start_tls(*ldap_struct, version);
 758         if (rc) {
 759                 return rc;
 760         }
 761
 762         return LDAP_SUCCESS;
 763 }
 764
 765 /*******************************************************************
 766  open a connection to the ldap server.
 767 ******************************************************************/
 768 static int smbldap_open_connection (struct smbldap_state *ldap_state)
 769
 770 {
 771         int rc = LDAP_SUCCESS;
 772         int version;
 773         LDAP **ldap_struct = &ldap_state->ldap_struct;
 774
 775         rc = smb_ldap_setup_conn(ldap_struct, ldap_state->uri);
 776         if (rc) {
 777                 return rc;
 778         }
 779
 780         /* Store the LDAP pointer in a lookup list */
 781
 782         smbldap_store_state(*ldap_struct, ldap_state);
 783
 784         /* Upgrade to LDAPv3 if possible */
 785
 786         rc = smb_ldap_upgrade_conn(*ldap_struct, &version);
 787         if (rc) {
 788                 return rc;
 789         }
 790
 791         /* Start TLS if required */
 792
 793         rc = smb_ldap_start_tls(*ldap_struct, version);
 794         if (rc) {
 795                 return rc;
 796         }
 797
 798         DEBUG(2, ("smbldap_open_connection: connection opened\n"));
 799         return rc;
 800 }
 801
 802 /*******************************************************************
 803  a rebind function for authenticated referrals
 804  This version takes a void* that we can shove useful stuff in :-)
 805 ******************************************************************/
 806 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 807 #else
 808 static int rebindproc_with_state  (LDAP * ld, char **whop, char **credp,
 809                                    int *methodp, int freeit, void *arg)
 810 {
 811         struct smbldap_state *ldap_state = arg;
 812
 813         /** @TODO Should we be doing something to check what servers we rebind to?
 814             Could we get a referral to a machine that we don't want to give our
 815             username and password to? */
 816
 817         if (freeit) {
 818                 SAFE_FREE(*whop);
 819                 if (*credp) {
 820                         memset(*credp, '\0', strlen(*credp));
 821                 }
 822                 SAFE_FREE(*credp);
 823         } else {
 824                 DEBUG(5,("rebind_proc_with_state: Rebinding as \"%s\"\n",
 825                           ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 826
 827                 if (ldap_state->anonymous) {
 828                         *whop = NULL;
 829                         *credp = NULL;
 830                 } else {
 831                         *whop = SMB_STRDUP(ldap_state->bind_dn);
 832                         if (!*whop) {
 833                                 return LDAP_NO_MEMORY;
 834                         }
 835                         *credp = SMB_STRDUP(ldap_state->bind_secret);
 836                         if (!*credp) {
 837                                 SAFE_FREE(*whop);
 838                                 return LDAP_NO_MEMORY;
 839                         }
 840                 }
 841                 *methodp = LDAP_AUTH_SIMPLE;
 842         }
 843
 844         GetTimeOfDay(&ldap_state->last_rebind);
 845
 846         return 0;
 847 }
 848 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 849
 850 /*******************************************************************
 851  a rebind function for authenticated referrals
 852  This version takes a void* that we can shove useful stuff in :-)
 853  and actually does the connection.
 854 ******************************************************************/
 855 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 856 static int rebindproc_connect_with_state (LDAP *ldap_struct,
 857                                           LDAP_CONST char *url,
 858                                           ber_tag_t request,
 859                                           ber_int_t msgid, void *arg)
 860 {
 861         struct smbldap_state *ldap_state =
 862                 (struct smbldap_state *)arg;
 863         int rc;
 864         int version;
 865
 866         DEBUG(5,("rebindproc_connect_with_state: Rebinding to %s as \"%s\"\n",
 867                  url, ldap_state->bind_dn?ldap_state->bind_dn:"[Anonymous bind]"));
 868
 869         /* call START_TLS again (ldaps:// is handled by the OpenLDAP library
 870          * itself) before rebinding to another LDAP server to avoid to expose
 871          * our credentials. At least *try* to secure the connection - Guenther */
 872
 873         smb_ldap_upgrade_conn(ldap_struct, &version);
 874         smb_ldap_start_tls(ldap_struct, version);
 875
 876         /** @TODO Should we be doing something to check what servers we rebind to?
 877             Could we get a referral to a machine that we don't want to give our
 878             username and password to? */
 879
 880         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 881
 882         /* only set the last rebind timestamp when we did rebind after a
 883          * non-read LDAP operation. That way we avoid the replication sleep
 884          * after a simple redirected search operation - Guenther */
 885
 886         switch (request) {
 887
 888                 case LDAP_REQ_MODIFY:
 889                 case LDAP_REQ_ADD:
 890                 case LDAP_REQ_DELETE:
 891                 case LDAP_REQ_MODDN:
 892                 case LDAP_REQ_EXTENDED:
 893                         DEBUG(10,("rebindproc_connect_with_state: "
 894                                 "setting last_rebind timestamp "
 895                                 "(req: 0x%02x)\n", (unsigned int)request));
 896                         GetTimeOfDay(&ldap_state->last_rebind);
 897                         break;
 898                 default:
 899                         ZERO_STRUCT(ldap_state->last_rebind);
 900                         break;
 901         }
 902
 903         return rc;
 904 }
 905 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 906
 907 /*******************************************************************
 908  Add a rebind function for authenticated referrals
 909 ******************************************************************/
 910 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 911 #else
 912 # if LDAP_SET_REBIND_PROC_ARGS == 2
 913 static int rebindproc (LDAP *ldap_struct, char **whop, char **credp,
 914                        int *method, int freeit )
 915 {
 916         struct smbldap_state *ldap_state = smbldap_find_state(ldap_struct);
 917
 918         return rebindproc_with_state(ldap_struct, whop, credp,
 919                                      method, freeit, ldap_state);
 920
 921 }
 922 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 923 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 924
 925 /*******************************************************************
 926  a rebind function for authenticated referrals
 927  this also does the connection, but no void*.
 928 ******************************************************************/
 929 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 930 # if LDAP_SET_REBIND_PROC_ARGS == 2
 931 static int rebindproc_connect (LDAP * ld, LDAP_CONST char *url, int request,
 932                                ber_int_t msgid)
 933 {
 934         struct smbldap_state *ldap_state = smbldap_find_state(ld);
 935
 936         return rebindproc_connect_with_state(ld, url, (ber_tag_t)request, msgid,
 937                                              ldap_state);
 938 }
 939 # endif /*LDAP_SET_REBIND_PROC_ARGS == 2*/
 940 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 941
 942 /*******************************************************************
 943  connect to the ldap server under system privilege.
 944 ******************************************************************/
 945 static int smbldap_connect_system(struct smbldap_state *ldap_state, LDAP * ldap_struct)
 946 {
 947         int rc;
 948         int version;
 949
 950         if (!ldap_state->anonymous && !ldap_state->bind_dn) {
 951
 952                 /* get the default dn and password only if they are not set already */
 953                 if (!fetch_ldap_pw(&ldap_state->bind_dn, &ldap_state->bind_secret)) {
 954                         DEBUG(0, ("ldap_connect_system: Failed to retrieve password from secrets.tdb\n"));
 955                         return LDAP_INVALID_CREDENTIALS;
 956                 }
 957         }
 958
 959         /* removed the sasl_bind_s "EXTERNAL" stuff, as my testsuite
 960            (OpenLDAP) doesnt' seem to support it */
 961
 962         DEBUG(10,("ldap_connect_system: Binding to ldap server %s as \"%s\"\n",
 963                   ldap_state->uri, ldap_state->bind_dn));
 964
 965 #ifdef HAVE_LDAP_SET_REBIND_PROC
 966 #if defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)
 967 # if LDAP_SET_REBIND_PROC_ARGS == 2
 968         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect);
 969 # endif
 970 # if LDAP_SET_REBIND_PROC_ARGS == 3
 971         ldap_set_rebind_proc(ldap_struct, &rebindproc_connect_with_state, (void *)ldap_state);
 972 # endif
 973 #else /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 974 # if LDAP_SET_REBIND_PROC_ARGS == 2
 975         ldap_set_rebind_proc(ldap_struct, &rebindproc);
 976 # endif
 977 # if LDAP_SET_REBIND_PROC_ARGS == 3
 978         ldap_set_rebind_proc(ldap_struct, &rebindproc_with_state, (void *)ldap_state);
 979 # endif
 980 #endif /*defined(LDAP_API_FEATURE_X_OPENLDAP) && (LDAP_API_VERSION > 2000)*/
 981 #endif
 982
 983         rc = ldap_simple_bind_s(ldap_struct, ldap_state->bind_dn, ldap_state->bind_secret);
 984
 985         if (rc != LDAP_SUCCESS) {
 986                 char *ld_error = NULL;
 987                 ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_ERROR_STRING,
 988                                 &ld_error);
 989                 DEBUG(ldap_state->num_failures ? 2 : 0,
 990                       ("failed to bind to server %s with dn=\"%s\" Error: %s\n\t%s\n",
 991                                ldap_state->uri,
 992                                ldap_state->bind_dn ? ldap_state->bind_dn : "[Anonymous bind]",
 993                                ldap_err2string(rc),
 994                                ld_error ? ld_error : "(unknown)"));
 995                 SAFE_FREE(ld_error);
 996                 ldap_state->num_failures++;
 997                 return rc;
 998         }
 999
1000         ldap_state->num_failures = 0;
1001         ldap_state->paged_results = False;
1002
1003         ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_PROTOCOL_VERSION, &version);
1004
1005         if (smbldap_has_control(ldap_state->ldap_struct, ADS_PAGE_CTL_OID) && version == 3) {
1006                 ldap_state->paged_results = True;
1007         }
1008
1009         DEBUG(3, ("ldap_connect_system: successful connection to the LDAP server\n"));
1010         DEBUGADD(10, ("ldap_connect_system: LDAP server %s support paged results\n",
1011                 ldap_state->paged_results ? "does" : "does not"));
1012         return rc;
1013 }
1014
1015 static void smbldap_idle_fn(struct event_context *event_ctx,
1016                             struct timed_event *te,
1017                             struct timeval now,
1018                             void *private_data);
1019
1020 /**********************************************************************
1021  Connect to LDAP server (called before every ldap operation)
1022 *********************************************************************/
1023 static int smbldap_open(struct smbldap_state *ldap_state)
1024 {
1025         int rc, opt_rc;
1026         bool reopen = False;
1027         SMB_ASSERT(ldap_state);
1028
1029         if ((ldap_state->ldap_struct != NULL) && ((ldap_state->last_ping + SMBLDAP_DONT_PING_TIME) < time(NULL))) {
1030
1031 #ifdef HAVE_UNIXSOCKET
1032                 struct sockaddr_un addr;
1033 #else
1034                 struct sockaddr addr;
1035 #endif
1036                 socklen_t len = sizeof(addr);
1037                 int sd;
1038
1039                 opt_rc = ldap_get_option(ldap_state->ldap_struct, LDAP_OPT_DESC, &sd);
1040                 if (opt_rc == 0 && (getpeername(sd, (struct sockaddr *) &addr, &len)) < 0 )
1041                         reopen = True;
1042
1043 #ifdef HAVE_UNIXSOCKET
1044                 if (opt_rc == 0 && addr.sun_family == AF_UNIX)
1045                         reopen = True;
1046 #endif
1047                 if (reopen) {
1048                         /* the other end has died. reopen. */
1049                         ldap_unbind(ldap_state->ldap_struct);
1050                         ldap_state->ldap_struct = NULL;
1051                         ldap_state->last_ping = (time_t)0;
1052                 } else {
1053                         ldap_state->last_ping = time(NULL);
1054                 }
1055         }
1056
1057         if (ldap_state->ldap_struct != NULL) {
1058                 DEBUG(11,("smbldap_open: already connected to the LDAP server\n"));
1059                 return LDAP_SUCCESS;
1060         }
1061
1062         if ((rc = smbldap_open_connection(ldap_state))) {
1063                 return rc;
1064         }
1065
1066         if ((rc = smbldap_connect_system(ldap_state, ldap_state->ldap_struct))) {
1067                 ldap_unbind(ldap_state->ldap_struct);
1068                 ldap_state->ldap_struct = NULL;
1069                 return rc;
1070         }
1071
1072
1073         ldap_state->last_ping = time(NULL);
1074         ldap_state->pid = sys_getpid();
1075
1076         TALLOC_FREE(ldap_state->idle_event);
1077
1078         if (ldap_state->event_context != NULL) {
1079                 ldap_state->idle_event = event_add_timed(
1080                         ldap_state->event_context, NULL,
1081                         timeval_current_ofs(SMBLDAP_IDLE_TIME, 0),
1082                         smbldap_idle_fn, ldap_state);
1083         }
1084
1085         DEBUG(4,("The LDAP server is successfully connected\n"));
1086
1087         return LDAP_SUCCESS;
1088 }
1089
1090 /**********************************************************************
1091 Disconnect from LDAP server
1092 *********************************************************************/
1093 static NTSTATUS smbldap_close(struct smbldap_state *ldap_state)
1094 {
1095         if (!ldap_state)
1096                 return NT_STATUS_INVALID_PARAMETER;
1097
1098         if (ldap_state->ldap_struct != NULL) {
1099                 ldap_unbind(ldap_state->ldap_struct);
1100                 ldap_state->ldap_struct = NULL;
1101         }
1102
1103         smbldap_delete_state(ldap_state);
1104
1105         DEBUG(5,("The connection to the LDAP server was closed\n"));
1106         /* maybe free the results here --metze */
1107
1108         return NT_STATUS_OK;
1109 }
1110
1111 static bool got_alarm;
1112
1113 static void (*old_handler)(int);
1114
1115 static void gotalarm_sig(int dummy)
1116 {
1117         got_alarm = True;
1118 }
1119
1120 static int another_ldap_try(struct smbldap_state *ldap_state, int *rc,
1121                             int *attempts, time_t endtime)
1122 {
1123         time_t now = time(NULL);
1124         int open_rc = LDAP_SERVER_DOWN;
1125
1126         if (*rc != LDAP_SERVER_DOWN)
1127                 goto no_next;
1128
1129         if (now >= endtime) {
1130                 smbldap_close(ldap_state);
1131                 *rc = LDAP_TIMEOUT;
1132                 goto no_next;
1133         }
1134
1135         if (*attempts == 0) {
1136                 got_alarm = False;
1137                 old_handler = CatchSignal(SIGALRM, gotalarm_sig);
1138                 alarm(endtime - now);
1139
1140                 if (ldap_state->pid != sys_getpid())
1141                         smbldap_close(ldap_state);
1142         }
1143
1144         while (1) {
1145
1146                 if (*attempts != 0)
1147                         smb_msleep(1000);
1148
1149                 *attempts += 1;
1150
1151                 open_rc = smbldap_open(ldap_state);
1152
1153                 if (open_rc == LDAP_SUCCESS) {
1154                         ldap_state->last_use = now;
1155                         return True;
1156                 }
1157
1158                 if (open_rc == LDAP_INSUFFICIENT_ACCESS) {
1159                         /* The fact that we are non-root or any other
1160                          * access-denied condition will not change in the next
1161                          * round of trying */
1162                         *rc = open_rc;
1163                         break;
1164                 }
1165
1166                 if (got_alarm) {
1167                         *rc = LDAP_TIMEOUT;
1168                         break;
1169                 }
1170
1171                 if (open_rc != LDAP_SUCCESS) {
1172                         DEBUG(1, ("Connection to LDAP server failed for the "
1173                                   "%d try!\n", *attempts));
1174                 }
1175         }
1176
1177  no_next:
1178         CatchSignal(SIGALRM, old_handler);
1179         alarm(0);
1180         ldap_state->last_use = now;
1181         return False;
1182 }
1183
1184 /*********************************************************************
1185  ********************************************************************/
1186
1187 static int smbldap_search_ext(struct smbldap_state *ldap_state,
1188                               const char *base, int scope, const char *filter,
1189                               const char *attrs[], int attrsonly,
1190                               LDAPControl **sctrls, LDAPControl **cctrls,
1191                               int sizelimit, LDAPMessage **res)
1192 {
1193         int             rc = LDAP_SERVER_DOWN;
1194         int             attempts = 0;
1195         char           *utf8_filter;
1196         time_t          endtime = time(NULL)+lp_ldap_timeout();
1197         struct          timeval timeout;
1198         size_t          converted_size;
1199
1200         SMB_ASSERT(ldap_state);
1201
1202         DEBUG(5,("smbldap_search_ext: base => [%s], filter => [%s], "
1203                  "scope => [%d]\n", base, filter, scope));
1204
1205         if (ldap_state->last_rebind.tv_sec > 0) {
1206                 struct timeval  tval;
1207                 int64_t tdiff = 0;
1208                 int             sleep_time = 0;
1209
1210                 ZERO_STRUCT(tval);
1211                 GetTimeOfDay(&tval);
1212
1213                 tdiff = usec_time_diff(&tval, &ldap_state->last_rebind);
1214                 tdiff /= 1000; /* Convert to milliseconds. */
1215
1216                 sleep_time = lp_ldap_replication_sleep()-(int)tdiff;
1217                 sleep_time = MIN(sleep_time, MAX_LDAP_REPLICATION_SLEEP_TIME);
1218
1219                 if (sleep_time > 0) {
1220                         /* we wait for the LDAP replication */
1221                         DEBUG(5,("smbldap_search_ext: waiting %d milliseconds "
1222                                  "for LDAP replication.\n",sleep_time));
1223                         smb_msleep(sleep_time);
1224                         DEBUG(5,("smbldap_search_ext: go on!\n"));
1225                 }
1226                 ZERO_STRUCT(ldap_state->last_rebind);
1227         }
1228
1229         if (!push_utf8_allocate(&utf8_filter, filter, &converted_size)) {
1230                 return LDAP_NO_MEMORY;
1231         }
1232
1233         /* Setup timeout for the ldap_search_ext_s call - local and remote. */
1234         timeout.tv_sec = lp_ldap_timeout();
1235         timeout.tv_usec = 0;
1236
1237         /* Setup alarm timeout.... Do we need both of these ? JRA.
1238          * Yes, I think we do need both of these. The server timeout only
1239          * covers the case where the server's operation takes too long. It
1240          * does not cover the case where the request hangs on its way to the
1241          * server. The server side timeout is not strictly necessary, it's
1242          * just a bit more kind to the server. VL. */
1243
1244         got_alarm = 0;
1245         CatchSignal(SIGALRM, SIGNAL_CAST gotalarm_sig);
1246         alarm(lp_ldap_timeout());
1247         /* End setup timeout. */
1248
1249         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1250                 rc = ldap_search_ext_s(ldap_state->ldap_struct, base, scope,
1251                                        utf8_filter,
1252                                        CONST_DISCARD(char **, attrs),
1253                                        attrsonly, sctrls, cctrls, &timeout,
1254                                        sizelimit, res);
1255                 if (rc != LDAP_SUCCESS) {
1256                         char *ld_error = NULL;
1257                         int ld_errno;
1258
1259                         ldap_get_option(ldap_state->ldap_struct,
1260                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1261
1262                         ldap_get_option(ldap_state->ldap_struct,
1263                                         LDAP_OPT_ERROR_STRING, &ld_error);
1264                         DEBUG(10, ("Failed search for base: %s, error: %d (%s) "
1265                                    "(%s)\n", base, ld_errno,
1266                                    ldap_err2string(rc),
1267                                    ld_error ? ld_error : "unknown"));
1268                         SAFE_FREE(ld_error);
1269
1270                         if (ld_errno == LDAP_SERVER_DOWN) {
1271                                 ldap_unbind(ldap_state->ldap_struct);
1272                                 ldap_state->ldap_struct = NULL;
1273                         }
1274                 }
1275         }
1276
1277         SAFE_FREE(utf8_filter);
1278
1279         /* Teardown timeout. */
1280         CatchSignal(SIGALRM, SIGNAL_CAST SIG_IGN);
1281         alarm(0);
1282
1283         if (got_alarm != 0)
1284                 return LDAP_TIMELIMIT_EXCEEDED;
1285
1286         return rc;
1287 }
1288
1289 int smbldap_search(struct smbldap_state *ldap_state,
1290                    const char *base, int scope, const char *filter,
1291                    const char *attrs[], int attrsonly,
1292                    LDAPMessage **res)
1293 {
1294         return smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1295                                   attrsonly, NULL, NULL, LDAP_NO_LIMIT, res);
1296 }
1297
1298 int smbldap_search_paged(struct smbldap_state *ldap_state,
1299                          const char *base, int scope, const char *filter,
1300                          const char **attrs, int attrsonly, int pagesize,
1301                          LDAPMessage **res, void **cookie)
1302 {
1303         LDAPControl     pr;
1304         LDAPControl     **rcontrols;
1305         LDAPControl     *controls[2] = { NULL, NULL};
1306         BerElement      *cookie_be = NULL;
1307         struct berval   *cookie_bv = NULL;
1308         int             tmp = 0, i, rc;
1309         bool            critical = True;
1310
1311         *res = NULL;
1312
1313         DEBUG(3,("smbldap_search_paged: base => [%s], filter => [%s],"
1314                  "scope => [%d], pagesize => [%d]\n",
1315                  base, filter, scope, pagesize));
1316
1317         cookie_be = ber_alloc_t(LBER_USE_DER);
1318         if (cookie_be == NULL) {
1319                 DEBUG(0,("smbldap_create_page_control: ber_alloc_t returns "
1320                          "NULL\n"));
1321                 return LDAP_NO_MEMORY;
1322         }
1323
1324         /* construct cookie */
1325         if (*cookie != NULL) {
1326                 ber_printf(cookie_be, "{iO}", (ber_int_t) pagesize, *cookie);
1327                 ber_bvfree((struct berval *)*cookie); /* don't need it from last time */
1328                 *cookie = NULL;
1329         } else {
1330                 ber_printf(cookie_be, "{io}", (ber_int_t) pagesize, "", 0);
1331         }
1332         ber_flatten(cookie_be, &cookie_bv);
1333
1334         pr.ldctl_oid = CONST_DISCARD(char *, ADS_PAGE_CTL_OID);
1335         pr.ldctl_iscritical = (char) critical;
1336         pr.ldctl_value.bv_len = cookie_bv->bv_len;
1337         pr.ldctl_value.bv_val = cookie_bv->bv_val;
1338
1339         controls[0] = &pr;
1340         controls[1] = NULL;
1341
1342         rc = smbldap_search_ext(ldap_state, base, scope, filter, attrs,
1343                                  0, controls, NULL, LDAP_NO_LIMIT, res);
1344
1345         ber_free(cookie_be, 1);
1346         ber_bvfree(cookie_bv);
1347
1348         if (rc != 0) {
1349                 DEBUG(3,("smbldap_search_paged: smbldap_search_ext(%s) "
1350                          "failed with [%s]\n", filter, ldap_err2string(rc)));
1351                 goto done;
1352         }
1353
1354         DEBUG(3,("smbldap_search_paged: search was successfull\n"));
1355
1356         rc = ldap_parse_result(ldap_state->ldap_struct, *res, NULL, NULL,
1357                                NULL, NULL, &rcontrols,  0);
1358         if (rc != 0) {
1359                 DEBUG(3,("smbldap_search_paged: ldap_parse_result failed " \
1360                          "with [%s]\n", ldap_err2string(rc)));
1361                 goto done;
1362         }
1363
1364         if (rcontrols == NULL)
1365                 goto done;
1366
1367         for (i=0; rcontrols[i]; i++) {
1368
1369                 if (strcmp(ADS_PAGE_CTL_OID, rcontrols[i]->ldctl_oid) != 0)
1370                         continue;
1371
1372                 cookie_be = ber_init(&rcontrols[i]->ldctl_value);
1373                 ber_scanf(cookie_be,"{iO}", &tmp, &cookie_bv);
1374                 /* the berval is the cookie, but must be freed when it is all
1375                    done */
1376                 if (cookie_bv->bv_len)
1377                         *cookie=ber_bvdup(cookie_bv);
1378                 else
1379                         *cookie=NULL;
1380                 ber_bvfree(cookie_bv);
1381                 ber_free(cookie_be, 1);
1382                 break;
1383         }
1384         ldap_controls_free(rcontrols);
1385 done:
1386         return rc;
1387 }
1388
1389 int smbldap_modify(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1390 {
1391         int             rc = LDAP_SERVER_DOWN;
1392         int             attempts = 0;
1393         char           *utf8_dn;
1394         time_t          endtime = time(NULL)+lp_ldap_timeout();
1395         size_t          converted_size;
1396
1397         SMB_ASSERT(ldap_state);
1398
1399         DEBUG(5,("smbldap_modify: dn => [%s]\n", dn ));
1400
1401         if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1402                 return LDAP_NO_MEMORY;
1403         }
1404
1405         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1406                 rc = ldap_modify_s(ldap_state->ldap_struct, utf8_dn, attrs);
1407                 if (rc != LDAP_SUCCESS) {
1408                         char *ld_error = NULL;
1409                         int ld_errno;
1410
1411                         ldap_get_option(ldap_state->ldap_struct,
1412                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1413
1414                         ldap_get_option(ldap_state->ldap_struct,
1415                                         LDAP_OPT_ERROR_STRING, &ld_error);
1416                         DEBUG(10, ("Failed to modify dn: %s, error: %d (%s) "
1417                                    "(%s)\n", dn, ld_errno,
1418                                    ldap_err2string(rc),
1419                                    ld_error ? ld_error : "unknown"));
1420                         SAFE_FREE(ld_error);
1421
1422                         if (ld_errno == LDAP_SERVER_DOWN) {
1423                                 ldap_unbind(ldap_state->ldap_struct);
1424                                 ldap_state->ldap_struct = NULL;
1425                         }
1426                 }
1427         }
1428
1429         SAFE_FREE(utf8_dn);
1430         return rc;
1431 }
1432
1433 int smbldap_add(struct smbldap_state *ldap_state, const char *dn, LDAPMod *attrs[])
1434 {
1435         int             rc = LDAP_SERVER_DOWN;
1436         int             attempts = 0;
1437         char           *utf8_dn;
1438         time_t          endtime = time(NULL)+lp_ldap_timeout();
1439         size_t          converted_size;
1440
1441         SMB_ASSERT(ldap_state);
1442
1443         DEBUG(5,("smbldap_add: dn => [%s]\n", dn ));
1444
1445         if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1446                 return LDAP_NO_MEMORY;
1447         }
1448
1449         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1450                 rc = ldap_add_s(ldap_state->ldap_struct, utf8_dn, attrs);
1451                 if (rc != LDAP_SUCCESS) {
1452                         char *ld_error = NULL;
1453                         int ld_errno;
1454
1455                         ldap_get_option(ldap_state->ldap_struct,
1456                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1457
1458                         ldap_get_option(ldap_state->ldap_struct,
1459                                         LDAP_OPT_ERROR_STRING, &ld_error);
1460                         DEBUG(10, ("Failed to add dn: %s, error: %d (%s) "
1461                                    "(%s)\n", dn, ld_errno,
1462                                    ldap_err2string(rc),
1463                                    ld_error ? ld_error : "unknown"));
1464                         SAFE_FREE(ld_error);
1465
1466                         if (ld_errno == LDAP_SERVER_DOWN) {
1467                                 ldap_unbind(ldap_state->ldap_struct);
1468                                 ldap_state->ldap_struct = NULL;
1469                         }
1470                 }
1471         }
1472
1473         SAFE_FREE(utf8_dn);
1474         return rc;
1475 }
1476
1477 int smbldap_delete(struct smbldap_state *ldap_state, const char *dn)
1478 {
1479         int             rc = LDAP_SERVER_DOWN;
1480         int             attempts = 0;
1481         char           *utf8_dn;
1482         time_t          endtime = time(NULL)+lp_ldap_timeout();
1483         size_t          converted_size;
1484
1485         SMB_ASSERT(ldap_state);
1486
1487         DEBUG(5,("smbldap_delete: dn => [%s]\n", dn ));
1488
1489         if (!push_utf8_allocate(&utf8_dn, dn, &converted_size)) {
1490                 return LDAP_NO_MEMORY;
1491         }
1492
1493         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1494                 rc = ldap_delete_s(ldap_state->ldap_struct, utf8_dn);
1495                 if (rc != LDAP_SUCCESS) {
1496                         char *ld_error = NULL;
1497                         int ld_errno;
1498
1499                         ldap_get_option(ldap_state->ldap_struct,
1500                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1501
1502                         ldap_get_option(ldap_state->ldap_struct,
1503                                         LDAP_OPT_ERROR_STRING, &ld_error);
1504                         DEBUG(10, ("Failed to delete dn: %s, error: %d (%s) "
1505                                    "(%s)\n", dn, ld_errno,
1506                                    ldap_err2string(rc),
1507                                    ld_error ? ld_error : "unknown"));
1508                         SAFE_FREE(ld_error);
1509
1510                         if (ld_errno == LDAP_SERVER_DOWN) {
1511                                 ldap_unbind(ldap_state->ldap_struct);
1512                                 ldap_state->ldap_struct = NULL;
1513                         }
1514                 }
1515         }
1516
1517         SAFE_FREE(utf8_dn);
1518         return rc;
1519 }
1520
1521 int smbldap_extended_operation(struct smbldap_state *ldap_state,
1522                                LDAP_CONST char *reqoid, struct berval *reqdata,
1523                                LDAPControl **serverctrls, LDAPControl **clientctrls,
1524                                char **retoidp, struct berval **retdatap)
1525 {
1526         int             rc = LDAP_SERVER_DOWN;
1527         int             attempts = 0;
1528         time_t          endtime = time(NULL)+lp_ldap_timeout();
1529
1530         if (!ldap_state)
1531                 return (-1);
1532
1533         while (another_ldap_try(ldap_state, &rc, &attempts, endtime)) {
1534                 rc = ldap_extended_operation_s(ldap_state->ldap_struct, reqoid,
1535                                                reqdata, serverctrls,
1536                                                clientctrls, retoidp, retdatap);
1537                 if (rc != LDAP_SUCCESS) {
1538                         char *ld_error = NULL;
1539                         int ld_errno;
1540
1541                         ldap_get_option(ldap_state->ldap_struct,
1542                                         LDAP_OPT_ERROR_NUMBER, &ld_errno);
1543
1544                         ldap_get_option(ldap_state->ldap_struct,
1545                                         LDAP_OPT_ERROR_STRING, &ld_error);
1546                         DEBUG(10, ("Extended operation failed with error: "
1547                                    "%d (%s) (%s)\n", ld_errno,
1548                                    ldap_err2string(rc),
1549                                    ld_error ? ld_error : "unknown"));
1550                         SAFE_FREE(ld_error);
1551
1552                         if (ld_errno == LDAP_SERVER_DOWN) {
1553                                 ldap_unbind(ldap_state->ldap_struct);
1554                                 ldap_state->ldap_struct = NULL;
1555                         }
1556                 }
1557         }
1558
1559         return rc;
1560 }
1561
1562 /*******************************************************************
1563  run the search by name.
1564 ******************************************************************/
1565 int smbldap_search_suffix (struct smbldap_state *ldap_state,
1566                            const char *filter, const char **search_attr,
1567                            LDAPMessage ** result)
1568 {
1569         return smbldap_search(ldap_state, lp_ldap_suffix(), LDAP_SCOPE_SUBTREE,
1570                               filter, search_attr, 0, result);
1571 }
1572
1573 static void smbldap_idle_fn(struct event_context *event_ctx,
1574                             struct timed_event *te,
1575                             struct timeval now,
1576                             void *private_data)
1577 {
1578         struct smbldap_state *state = (struct smbldap_state *)private_data;
1579
1580         TALLOC_FREE(state->idle_event);
1581
1582         if (state->ldap_struct == NULL) {
1583                 DEBUG(10,("ldap connection not connected...\n"));
1584                 return;
1585         }
1586
1587         if ((state->last_use+SMBLDAP_IDLE_TIME) > now.tv_sec) {
1588                 DEBUG(10,("ldap connection not idle...\n"));
1589
1590                 state->idle_event = event_add_timed(
1591                         event_ctx, NULL,
1592                         timeval_add(&now, SMBLDAP_IDLE_TIME, 0),
1593                         smbldap_idle_fn,
1594                         private_data);
1595                 return;
1596         }
1597
1598         DEBUG(7,("ldap connection idle...closing connection\n"));
1599         smbldap_close(state);
1600 }
1601
1602 /**********************************************************************
1603  Housekeeping
1604  *********************************************************************/
1605
1606 void smbldap_free_struct(struct smbldap_state **ldap_state)
1607 {
1608         smbldap_close(*ldap_state);
1609
1610         if ((*ldap_state)->bind_secret) {
1611                 memset((*ldap_state)->bind_secret, '\0', strlen((*ldap_state)->bind_secret));
1612         }
1613
1614         SAFE_FREE((*ldap_state)->bind_dn);
1615         SAFE_FREE((*ldap_state)->bind_secret);
1616
1617         TALLOC_FREE((*ldap_state)->idle_event);
1618
1619         *ldap_state = NULL;
1620
1621         /* No need to free any further, as it is talloc()ed */
1622 }
1623
1624
1625 /**********************************************************************
1626  Intitalise the 'general' ldap structures, on which ldap operations may be conducted
1627  *********************************************************************/
1628
1629 NTSTATUS smbldap_init(TALLOC_CTX *mem_ctx, struct event_context *event_ctx,
1630                       const char *location,
1631                       struct smbldap_state **smbldap_state)
1632 {
1633         *smbldap_state = TALLOC_ZERO_P(mem_ctx, struct smbldap_state);
1634         if (!*smbldap_state) {
1635                 DEBUG(0, ("talloc() failed for ldapsam private_data!\n"));
1636                 return NT_STATUS_NO_MEMORY;
1637         }
1638
1639         if (location) {
1640                 (*smbldap_state)->uri = talloc_strdup(mem_ctx, location);
1641         } else {
1642                 (*smbldap_state)->uri = "ldap://localhost";
1643         }
1644
1645         (*smbldap_state)->event_context = event_ctx;
1646
1647         return NT_STATUS_OK;
1648 }
1649
1650 /*******************************************************************
1651  Return a copy of the DN for a LDAPMessage. Convert from utf8 to CH_UNIX.
1652 ********************************************************************/
1653 char *smbldap_get_dn(LDAP *ld, LDAPMessage *entry)
1654 {
1655         char *utf8_dn, *unix_dn;
1656         size_t converted_size;
1657
1658         utf8_dn = ldap_get_dn(ld, entry);
1659         if (!utf8_dn) {
1660                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1661                 return NULL;
1662         }
1663         if (!pull_utf8_allocate(&unix_dn, utf8_dn, &converted_size)) {
1664                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1665                            "[%s]\n", utf8_dn));
1666                 return NULL;
1667         }
1668         ldap_memfree(utf8_dn);
1669         return unix_dn;
1670 }
1671
1672  const char *smbldap_talloc_dn(TALLOC_CTX *mem_ctx, LDAP *ld,
1673                                LDAPMessage *entry)
1674 {
1675         char *utf8_dn, *unix_dn;
1676         size_t converted_size;
1677
1678         utf8_dn = ldap_get_dn(ld, entry);
1679         if (!utf8_dn) {
1680                 DEBUG (5, ("smbldap_get_dn: ldap_get_dn failed\n"));
1681                 return NULL;
1682         }
1683         if (!pull_utf8_talloc(mem_ctx, &unix_dn, utf8_dn, &converted_size)) {
1684                 DEBUG (0, ("smbldap_get_dn: String conversion failure utf8 "
1685                            "[%s]\n", utf8_dn));
1686                 return NULL;
1687         }
1688         ldap_memfree(utf8_dn);
1689         return unix_dn;
1690 }
1691
1692 /*******************************************************************
1693  Check if root-dse has a certain Control or Extension
1694 ********************************************************************/
1695
1696 static bool smbldap_check_root_dse(LDAP *ld, const char **attrs, const char *value)
1697 {
1698         LDAPMessage *msg = NULL;
1699         LDAPMessage *entry = NULL;
1700         char **values = NULL;
1701         int rc, num_result, num_values, i;
1702         bool result = False;
1703
1704         if (!attrs[0]) {
1705                 DEBUG(3,("smbldap_check_root_dse: nothing to look for\n"));
1706                 return False;
1707         }
1708
1709         if (!strequal(attrs[0], "supportedExtension") &&
1710             !strequal(attrs[0], "supportedControl") &&
1711             !strequal(attrs[0], "namingContexts")) {
1712                 DEBUG(3,("smbldap_check_root_dse: no idea what to query root-dse for: %s ?\n", attrs[0]));
1713                 return False;
1714         }
1715
1716         rc = ldap_search_s(ld, "", LDAP_SCOPE_BASE,
1717                            "(objectclass=*)", CONST_DISCARD(char **, attrs), 0 , &msg);
1718
1719         if (rc != LDAP_SUCCESS) {
1720                 DEBUG(3,("smbldap_check_root_dse: Could not search rootDSE\n"));
1721                 return False;
1722         }
1723
1724         num_result = ldap_count_entries(ld, msg);
1725
1726         if (num_result != 1) {
1727                 DEBUG(3,("smbldap_check_root_dse: Expected one rootDSE, got %d\n", num_result));
1728                 goto done;
1729         }
1730
1731         entry = ldap_first_entry(ld, msg);
1732
1733         if (entry == NULL) {
1734                 DEBUG(3,("smbldap_check_root_dse: Could not retrieve rootDSE\n"));
1735                 goto done;
1736         }
1737
1738         values = ldap_get_values(ld, entry, attrs[0]);
1739
1740         if (values == NULL) {
1741                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not support any %s\n", attrs[0]));
1742                 goto done;
1743         }
1744
1745         num_values = ldap_count_values(values);
1746
1747         if (num_values == 0) {
1748                 DEBUG(5,("smbldap_check_root_dse: LDAP Server does not have any %s\n", attrs[0]));
1749                 goto done;
1750         }
1751
1752         for (i=0; i<num_values; i++) {
1753                 if (strcmp(values[i], value) == 0)
1754                         result = True;
1755         }
1756
1757
1758  done:
1759         if (values != NULL)
1760                 ldap_value_free(values);
1761         if (msg != NULL)
1762                 ldap_msgfree(msg);
1763
1764         return result;
1765
1766 }
1767
1768 /*******************************************************************
1769  Check if LDAP-Server supports a certain Control (OID in string format)
1770 ********************************************************************/
1771
1772 bool smbldap_has_control(LDAP *ld, const char *control)
1773 {
1774         const char *attrs[] = { "supportedControl", NULL };
1775         return smbldap_check_root_dse(ld, attrs, control);
1776 }
1777
1778 /*******************************************************************
1779  Check if LDAP-Server supports a certain Extension (OID in string format)
1780 ********************************************************************/
1781
1782 bool smbldap_has_extension(LDAP *ld, const char *extension)
1783 {
1784         const char *attrs[] = { "supportedExtension", NULL };
1785         return smbldap_check_root_dse(ld, attrs, extension);
1786 }
1787
1788 /*******************************************************************
1789  Check if LDAP-Server holds a given namingContext
1790 ********************************************************************/
1791
1792 bool smbldap_has_naming_context(LDAP *ld, const char *naming_context)
1793 {
1794         const char *attrs[] = { "namingContexts", NULL };
1795         return smbldap_check_root_dse(ld, attrs, naming_context);
1796 }
1797
1798 bool smbldap_set_creds(struct smbldap_state *ldap_state, bool anon, const char *dn, const char *secret)
1799 {
1800         ldap_state->anonymous = anon;
1801
1802         /* free any previously set credential */
1803
1804         SAFE_FREE(ldap_state->bind_dn);
1805         if (ldap_state->bind_secret) {
1806                 /* make sure secrets are zeroed out of memory */
1807                 memset(ldap_state->bind_secret, '\0', strlen(ldap_state->bind_secret));
1808                 SAFE_FREE(ldap_state->bind_secret);
1809         }
1810
1811         if ( ! anon) {
1812                 ldap_state->bind_dn = SMB_STRDUP(dn);
1813                 ldap_state->bind_secret = SMB_STRDUP(secret);
1814         }
1815
1816         return True;
1817 }